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AUSCERT External Security Bulletin Redistribution
ESB-2019.0234.2
coturn security update
12 February 2019
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AusCERT Security Bulletin Summary
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Product: coturn
Publisher: Debian
Operating System: Debian GNU/Linux 9
Debian GNU/Linux 8
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-4059 CVE-2018-4058 CVE-2018-4056
Original Bulletin:
http://www.debian.org/security/2019/dsa-4373
https://lists.debian.org/debian-lts-announce/2019/02/msg00017.html
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running coturn check for an updated version of the software for
their operating system.
This bulletin contains two (2) advisories.
Revision History: February 12 2019: DLA 1671-1 added support for Debian 8
January 29 2019: Initial Release
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Debian Security Advisory DSA-4373-1 security@debian.org
https://www.debian.org/security/ Yves-Alexis Perez
January 28, 2019 https://www.debian.org/security/faq
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Package : coturn
CVE ID : CVE-2018-4056 CVE-2018-4058 CVE-2018-4059
Multiple vulnerabilities were discovered in coTURN, a TURN and STUN server for
VoIP.
CVE-2018-4056
An SQL injection vulnerability was discovered in the coTURN administrator
web portal. As the administration web interface is shared with the
production, it is unfortunately not possible to easily filter outside
access and this security update completely disable the web interface. Users
should use the local, command line interface instead.
CVE-2018-4058
Default configuration enables unsafe loopback forwarding. A remote attacker
with access to the TURN interface can use this vulnerability to gain access
to services that should be local only.
CVE-2018-4059
Default configuration uses an empty password for the local command line
administration interface. An attacker with access to the local console
(either a local attacker or a remote attacker taking advantage of
CVE-2018-4058) could escalade privileges to administrator of the coTURN
server.
For the stable distribution (stretch), these problems have been fixed in
version 4.5.0.5-1+deb9u1.
We recommend that you upgrade your coturn packages.
For the detailed security status of coturn please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/coturn
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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Package : coturn
Version : 4.2.1.2-1+deb8u1
CVE ID : CVE-2018-4056 CVE-2018-4058 CVE-2018-4059
Multiple vulnerabilities were discovered in coTURN, a TURN and STUN server for
VoIP.
CVE-2018-4056
An SQL injection vulnerability was discovered in the coTURN administrator
web portal. As the administration web interface is shared with the
production, it is unfortunately not possible to easily filter outside
access and this security update completely disables the web interface. Users
should use the local, command line interface instead.
CVE-2018-4058
Default configuration enables unsafe loopback forwarding. A remote attacker
with access to the TURN interface can use this vulnerability to gain access
to services that should be local only.
CVE-2018-4059
Default configuration uses an empty password for the local command line
administration interface. An attacker with access to the local console
(either a local attacker or a remote attacker taking advantage of
CVE-2018-4058) could escalade privileges to administrator of the coTURN
server.
For Debian 8 "Jessie", these problems have been fixed in version
4.2.1.2-1+deb8u1.
We recommend that you upgrade your coturn packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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